clk: imx6sl: add mmdc ipg clocks

i.MX6SL has MMDC0 and MMDC1 ipg clock in CCM CCGR, add them into
clock tree for clock management.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/imx/clk-imx6sl.c

@@ -386,6 +386,8 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node)
 	clks[IMX6SL_CLK_LCDIF_AXI]    = imx_clk_gate2("lcdif_axi",    "lcdif_axi_podf",    base + 0x74, 6);
 	clks[IMX6SL_CLK_LCDIF_PIX]    = imx_clk_gate2("lcdif_pix",    "lcdif_pix_podf",    base + 0x74, 8);
 	clks[IMX6SL_CLK_EPDC_PIX]     = imx_clk_gate2("epdc_pix",     "epdc_pix_podf",     base + 0x74, 10);
+	clks[IMX6SL_CLK_MMDC_P0_IPG]  = imx_clk_gate2_flags("mmdc_p0_ipg",  "ipg",         base + 0x74,	24, CLK_IS_CRITICAL);
+	clks[IMX6SL_CLK_MMDC_P1_IPG]  = imx_clk_gate2("mmdc_p1_ipg",  "ipg",	  	   base + 0x74,	26);
 	clks[IMX6SL_CLK_OCRAM]        = imx_clk_gate2("ocram",        "ocram_podf",        base + 0x74, 28);
 	clks[IMX6SL_CLK_PWM1]         = imx_clk_gate2("pwm1",         "perclk",            base + 0x78, 16);
 	clks[IMX6SL_CLK_PWM2]         = imx_clk_gate2("pwm2",         "perclk",            base + 0x78, 18);

include/dt-bindings/clock/imx6sl-clock.h

@@ -175,6 +175,8 @@
 #define IMX6SL_CLK_SSI2_IPG		162
 #define IMX6SL_CLK_SSI3_IPG		163
 #define IMX6SL_CLK_SPDIF_GCLK		164
-#define IMX6SL_CLK_END			165
+#define IMX6SL_CLK_MMDC_P0_IPG		165
+#define IMX6SL_CLK_MMDC_P1_IPG		166
+#define IMX6SL_CLK_END			167
 
 #endif /* __DT_BINDINGS_CLOCK_IMX6SL_H */